Acknowledgements
We would thank the PROPAM Study Group Members (Francesco Paolo Brunese, Francesco Carlomagno, Donatella Del Gaizo, Antonietta D’Onofrio, Patrizia Gallo, Maria Giuliano, Salvatore Iasevoli, Raffaele Limauro, Roberto Sassi, Giannamaria Vallefuoco) who collected the clinical cases.